High temperature inert barrier seal fluid / lubricant

[jatsg]

I am searching for a barrier seal fluid/heat transfer fluid/lubricant that can a withstand constant temperature of 225C with spikes to 450C. Moreover, it needs to be inert/non-flamable and can't cost $1,000's per gallon, like Krytox.

Any help would be greatly appreciated. Thanks.

John

 

[Milkboy]

Maybe one of the Royal Purple grades would do this job?

http://www.royal-purple.net/html/product_summary.html

-
Milkboy

 

[jatsg]

I was thinking more of a truely inert/completely non-flamable fluid, ie, some type of PFPE oil, but one that is economically feasable. Any suggestions?

 

[msouza]

Perhaps you can see a suitable option in this chart attached here...

Let me know if it is useful.

Regards.

Mario Souza
Application & Product Engineering
WMF Solutions Brazil

http://www.wmfsolutions.com

 

[flexibox]

I would recommend Royal Purple for this application.

 

[bk19702]

My company conducted some testing of the Royal Purple grades and found signs of coking at higher temperatures in some, the GT910 in particular, so be wary of that when selecting the grade. I have used 'lesser' temperature rated Royal Purple fluids on high temperature applications with good success with a Plan 54 system to keep the residence time in the seal cavity and bulk barrier fluid temperature low.

 

[longeron]

I think finding a decent fluid for those temperatures would be fairly dificult. Perhaps a heat transfer fluid like Therminol might suffice.

It might also be wise to scrutinize the support system for this application to be sure that it can remove enough heat.